Back to results
US 4,841,773 AGranted
Miniature inertial measurement unit
AssigneeLitton Systems, Inc.
InventorRobert E. Stewart
Life of this patent
Estimating the term…
Abstract
A three axis inertial measurement unit (IMU) is shown with three pairs of accelerometers mounted upon a platform that is rotated about a single axis perpendicular to the plane of the platform. Each pair of accelerometers is mounted in parallel, at an angle to the platform and to the single axis and at the same distance from the axis. The rotational motion may be either an oscillation about a dither axis or spinning about a spin axis.
Claims23
A three axis inertial measurement unit, comprising:
- a platform mounted for rotary motion about a single axis with respect to an object whose motion is being measured;
- a plurality of sensors mounted upon said platform, said sensors each having an input axis, an output axis, and a pendulous axis;
- and
- said sensors mounted upon said platform such that said input axis of each sensor is at a predetermined angle to said single axis and said platform.
1 more element
A three axis inertial measurement unit, comprising:
- a platform mounted for rotary motion about a single axis;
- a plurality of accelerometers arranged in pairs mounted with respect to an object whose motion is being measured
- said accelerometers mounted upon said platform such that said input axis of each accelerometer is at an angle to said single axis and said platform;
- and
- said pairs of accelerometers are mounted opposite one another on said platform having said input, output and pendulous axes parallel to each other.
2 more elements
A three axis inertial measurement unit, comprising:
- a platform mounted for an oscillating motion about a single dither axis;
- a plurality of accelerometers mounted upon said platform, said accelerometers each having an input axis, an output axis, and a pendulous axis;
- said accelerometers mounted upon said platform such that said input axis of each accelerometer is at an angle to said single dither axis and said platform;
- and
- said platform mounted about said dither axis by a plurality of vanes radiating from said dither axis toward said platform.
2 more elements
Dependencies are inferred from the claim text.